[web2py] auth.requires membership hide html

[BlueShadow]

Hi I like to hide a couple links on my page if users are not logged in and 
in the group of authors.
I tried the following
in the html page:
{{if auth.requires_membership('Author')==True: =A('new Article' , 
_href=URL(r=request,f='newArticle'))}}
but I only get syntax errors